Barking-drum.



Patented Mam), 1917.

2 SHEETS-SHEET l.

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@WWW/ MIU 2 SHEETS-SHEET 2.

L J.` RUSS.

BARKING DRUM. APPLCATIQM FILED FEB.12. i916.

30ml' d'. MSS, 0F INTERNATIONAL FALL, MINNESOTA.

renatre-nacre.

application tiled February 12, 1918. Serial No. 78,034.

To all whom it may concern:

lBe it known ythat l, JOHN J. Ross, a citizen ot the United States, residing at International Falls, in the county o1- Koochiching and State of Minnesota, have invented a new and useful improvement in Barking- Drums, oit' which the following is a specification.

This invention is designed for removing bark from Wood before it is ground into Wood pulp or reduced into chips for chemical ulp. ln the manufacture of ground Wood or chemical pulp, various kinds of soft Woods are used, and thiswoodvhasrto'be cleaned from the bark before being ground into ulp or the finished product will contain ark malnng the pulp inferior and objectionable.

Heretofore bark has been removed` by hand tools and bv what4 are termed barking machines of dierent designs Iand types. Some of these devices employ revolving disks with knives, the wood being held or pressed againstv the disks and the disks revolvedl with the inserted knives under high speed, thereby cutting the bark from the Wood. This process has resulted in a large Waste of good material, which would otherwise be employed for making pulp. To. reduce this amount oi' Waste barking drums have `been introduced, which clean the Wood and remove the bark with considerable less waste than has occurred by the use of knife bark- .ers. With this latter type of machine, the

logs, blocks and sticks of wood of large diameter or size will not pass through the drums as fast as smaller ones, thus bruising and slivering the large pieces which in the' manufacture of ground nood must necessarily be removed and Wasted. The use of hand tools is also too laborious. I

My invention is 'designed to overcome these objections and to separate the bark from the wood in an etlicient and edective manner. v

' My invention therefore comprises the features of construction and combination of parts hereinafter more particularly described and claimed.

In the accompanying drawings forming part oi this specification, Figure 1 is a side elevation'of a portion of my improved barking mill, it being understood that the structure may be extended and made of any length desired; Fig. 2 is a section tekenen the line ll--l of Fig. l, hig. 3 is a longitudinal section of a portion of a detail of my invention,v and Fig. 4C is a section taken on the line Y-Y of Fig. 3.

My invention contemplates the use oi a cylindrical drum or barrel preferably although not necessarily composed of sections such as A, B and C, as many sections being employed as will remove the bark and clean logs, blocks or sticks of Wood preparatory of being ground or cut into Wood pulp or chips for chemical pulp. Each of the sections A, B, C, etc., is of cylindrical form and of substantially even diameter, the section Abeing'what I term the receiving'` section and the sections B, (Liet/c., the finishing sections. The total number of sections employed is dependent on thc amount of wood to be barked, and the amount of tumbling action that is necessary for removing the bark.

The receiving section ,Ahgrs a thin cylindrical shell 2 of metal or other suitable material secured to flanged' rings 3 and 4 at their opposite ends by rivets 5 able means. To these end angle rings and or other suit- L are secured such as by rivets 6, bolts or other suitable means, iiat rings 7 and 8, which formbulk heads` the `inner edges of which are reinforced by angle\rings 9 andv 10 secured thereto and foiming central open- ,l ings through which the logs 'or sticks of'. Wood areI adapted to be passed inwardly.

The spac'jbetvveen the bulk heads or ends 7 and' 8 andthe Wall 2 forms a receptacle into which Water or other soaking and Washing valved supply-- liquid is introduced from the pipe 11i-or 'other suitable means.

The cylindrical Wall of each of the sections B and C is composed of longitudinally arranged bars 15 secured to the end rings 1G and 17 and spaced apart sulici'ently to allow the bark, which is knocked 101i' of the Wood during the tumbling action in the drum, to fall through the spaces and on to a conveyor such as D of any suitable construction arranged below the drum for bark away from the machine. The sections B, C, etc., have no bulk heads, their ends being entirely open and no water or other liquid held therein.

Each ofthe sections A. B, C, etc. is 'provided With a pair of track rings 'such as 20 and 21 over the periphery of/the'casing 2 or over the cylindrically arran ed-bars^ 15 by means of rivets 22 or any'y ot er suitable means. These track rings turn in pairs' of conducting the 50 removing members.

feuer bearings as and 2i (ses rig. i) which are mounted upon a suitable supporting frame 25. Each ofthe sections A, B, C, etc. is l'revoh ed at suitable speed Jfrom a drive shaft 26er other suitable source of power by a f belt 27 engaging a sprocket wheel 28 on the .section and asprocket pinion 29 on said shaft, all of` said sections being revolved in the same direction simultaneously. Thile the drum composed of said sections is revolvingtheJ logs, blocks or other pieces of wood after being sawed to the right lengths `for the usual grinders arefed or placedkin the receiving drum through its outer end l andby the rotation ,of the entire drum, the

pieces of wood `are made to tumble over and over'causing them `to tall or knock against inwardlyprojecting bark knockers BO, which remove the bark from the wood.4 These bark y knockers are as shown bulb'angles of any number desired, four being illustrated on `each section, evenly distanced apart `cir- `cumterentially and slopingendwise so as to `,form a spiral or worm, pitched to suit the y conditions or `time required to remove the bark. The bulb angles are secured on the inner surface of each section of the drum by rivets 31 or othersuita'ble means and preferably extendthe entire length ot each section.k The spiral' bulb angles are placed the yadjacent sections of the drum behind f. one another endwise, soJas to form a contin* nous worm or spiral forthe total length vof I the barking drum. The pitch of the spiral 35 bark' removing members is so arranged as to positively and steadily move or feed the logs, `blocksor sticks of wood toward the outlet end ofthe drum at such speed as will re- -1nove all of the bark without bruising and 4g slivering their ends or surfaces. The drum `isalso of suiiicicnt diameter', so that logs, i l blocks or sticks of wood of any size used t'or producing 1wood pulp will receive a tumbling action, causing the `bark to be removed by g5 the spiral bark A4removing elements in the drum.` y' VThe water'in the receiving section of 'the barking drum is used to meisten. the v'ood' placedtherein, so that the bark can belmolre readily detached by the spiral bark y The wood l.which is placed in they receiving sectionis transmit vtedl bythe spiralbarking elements from said .section ,into the'` nett A'succeeding section disposed adjacent theretooverthe inner bulk head;owing tos the combined tumbling action, and the feeding eilec't produced by the spiral members. also by fioatin g inthe soak ,l 'ing liquidf VAs the AwoodV advances through the'drnm ydue to the .combined tumbling ac- 4,gftio and feeding effect produced by the spirking members, the pieces of broken p urklremoved?'trom the wood by the bark "knockersl'are brol'en 'into small pieces lby the tumbling action of the material and these small pieces drop through the spaces between the slats or bars l5 and are caught upon the conveyer D below and by said conveyer, said pieces are carried away trom the machine.

It is not necessary to secure the drum sections together, although the drawing illustrates the pairs of adjacent end rings such as 4 and 6 fastened together by bolts 32.

When desired the sections of the drum when not secured together can be driven at different speeds by using sprocket pinions .29 of smaller or larger diameter. When using 'pinions successively increasing in diameter* toward the delivery `end of the drum the wood is carried at increasing speed toward said delivery end.

The machine as described cleans the wood entirely of bark leaving the wood in prime condition tor producing the pulp or chips ffree fromv bark and splintersZ Water can be v'poured upon the slatted portion ot the drum 8 5 for cleaning purposes when desired.

In accordance with the patent statutes, I have described the principles of operation of my invention, together with the apparatus which l now .consider to represent the best embodiment thereof, but l desire to have it understoodthat the construction shown is only illustrative, and that the invention can be carried out by other means and applied to uses other than those above set forth within the scope ot the following claims.

Having described my invention, what I claim as new and desire to proct 'by Letters Patent is:

l. A barking drum, comprisingin conibination, a rotatable slatted drum having a `wood receiving end, means for revolving said drum, and means arranged within said drum for loosening the bark on the wood and positively advancing the wood through the drum from its receiving end to its oppo- 1 site end.

2. A barking machine, comprising, in combination, a rotatable drum through one' end of which the wood to be barked is introduced, means for revolving said drum, and

a bark knocker spirally arranged on the in- .binatiom` a rotatable slatted drum having a wood receiving end, means for revolving said drum, and a plurality of spaced devices'lZO `arranged on the inner surface of said drum to positively advance the wood through the drum a nd against which the wood is adapted to impinge to loosen and remove the bark.

` 4a' A barking drum, comprising, in combination, a rotatable slatted drum having a. wood receiving end, means for revolving' said drum, and a plurality of spaced devices spirally arranged on the inner surface of said drinn to positively advance the wood through Athe drum and against which the Wood is adapted to impnge to .'ioosen and re move 'the bark.

5. A bai-king machine, comprising, in com bination, :i retataihe drum having a plurality of longitudinal sections arranged endwise together, e set of bark kwekers spimy zu:- ranged 011 the imei* surfaces of said sections, said knech'els being placed enflwise together to form substantie-Hy continuous weed feeding spirals traversing the entire length of said drum and for positively advancing the Wood therethrough,` one of said sections heing formed with a soaking compartment for the Wood, and the remainder of said sections having passages through which the free ark may pass.

In testimony vjherepf, I have signedy my name to this specicatwn. 

